In 1975—1976, the question of what facilities must be provided at airports to support liquid hydrogen (LH2)-fueled long-range commercial transport aircraft was addressed. The objective was to define the basic requirements for equipment, facilities, and operating procedures for a representative major air terminal to permit it to support significant traffic with LH2-fueled aircraft. The ground rules of the study stated that gaseous hydrogen was to be assumed to be available at the boundary of the airport. Large quantities of liquid hydrogen must be stored at any airport supporting commercial LH2 aircraft operations. The airport fuel distribution system provides LH2 to each gate position where interface connections are located in hydrant pits. The plant would require a sizable area and, considering property availability and cost, it might be cost effective to locate it some distance from the airport and transport the LH2 to the airport for storage.